51554444244 has 48 divisors (see below), whose sum is σ = 121221067968. Its totient is φ = 17052437248.

The previous prime is 51554444237. The next prime is 51554444297. The reversal of 51554444244 is 44244445515.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 51554444196 and 51554444205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5458294 + ... + 5467730.

It is an arithmetic number, because the mean of its divisors is an integer number (2525438916).

Almost surely, 2^51554444244 is an apocalyptic number.

It is an amenable number.

51554444244 is an abundant number, since it is smaller than the sum of its proper divisors (69666623724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51554444244 is a wasteful number, since it uses less digits than its factorization.

51554444244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12904 (or 12902 counting only the distinct ones).

The product of its digits is 1024000, while the sum is 42.

Adding to 51554444244 its reverse (44244445515), we get a palindrome (95798889759).

The spelling of 51554444244 in words is "fifty-one billion, five hundred fifty-four million, four hundred forty-four thousand, two hundred forty-four".